Support for 64-bit timespec seconds on 32-bit platforms

Modern 32-bit platforms (such as embedded Linux builds) support 64-bit
timestamps in time_t and timespec.

Author: lhoward

Sources/NIOConcurrencyHelpers/lock.swift

@@ -252,12 +252,16 @@ public final class ConditionLock<T: Equatable> {
         var curTime = timeval()
         gettimeofday(&curTime, nil)
 
+	#if canImport(wasi_pthread)
+	typealias _Seconds = Int64
+	#elseif canImport(Glibc)
+	typealias _Seconds = time_t
+	#else
+	typealias _Seconds = Int
+	#endif
+
         let allNSecs: Int64 = timeoutNS + Int64(curTime.tv_usec) * 1000
-        #if canImport(wasi_pthread)
-        let tvSec = curTime.tv_sec + (allNSecs / nsecPerSec)
-        #else
-        let tvSec = curTime.tv_sec + Int((allNSecs / nsecPerSec))
-        #endif
+        let tvSec = curTime.tv_sec + _Seconds((allNSecs / nsecPerSec))
 
         var timeoutAbs = timespec(
             tv_sec: tvSec,

Sources/NIOPosix/SelectorGeneric.swift

@@ -43,10 +43,18 @@ extension Optional {
 extension timespec {
     @inlinable
     init(timeAmount amount: TimeAmount) {
+        #if canImport(wasi_pthread)
+        typealias _Seconds = Int64
+        #elseif canImport(Glibc)
+        typealias _Seconds = time_t
+        #else
+        typealias _Seconds = Int
+        #endif
+
         let nsecPerSec: Int64 = 1_000_000_000
         let ns = amount.nanoseconds
         let sec = ns / nsecPerSec
-        self = timespec(tv_sec: Int(sec), tv_nsec: Int(ns - sec * nsecPerSec))
+        self = timespec(tv_sec: _Seconds(sec), tv_nsec: Int(ns - sec * nsecPerSec))
     }
 }
 #endif